Fibaro Door/Window SensorThe sensor expands the capabilities of the system by monitoring the opening of doors, windows and garage doors. It is used in automatic light control, access control and home security systems.

DS2406 Dual Addressable 1-Wire Switch Plus Memory offers a simple way to remotely control an open drain transistor and to monitor the logic level at transistor's output via the 1-Wire® bus for closed loop control.

PiFace Digital 2 is designed to plug on to the GPIO of your Raspberry Pi B+, allowing you to sense and control the real world of wired devices. You can detect the state of a switch, for example from a door sensor, a pressure pad or any number of other switch types and you can respond to that switch state. You can drive outputs to power motors, actuators, LEDs or anything you can imagine.